Liquid-fuel burner



Aug. 3 927, 1,641,017

E. l. STAPLES LIQUID FUEL BURNER Filed March so, 1923 7 I I Jar t g?Patented Aug. 30, 1927.

UNITED STATES EARLE I. STAPLES, or NEW YORK, N. Y.

. LIQUID-FUEL BURNER.

i Application filed March 30, 1923; Serial No. 628,828. 1

This invention relates to liquid fuelburn- (fans particularly to tipstructures there- Heretofore, burners of this type have been so formedand designed that along penetrat- 1 fl me s'i r uce With ny yp s offurnace and boiler structures a long penetrating flame is highlyobjectionablein that its impingement against the back and side walls ofthe furnace or boiler is injurious to said walls and results incarbonation he eo Itis an object of my inventionto provide N p st uc rwhe in. e, f e il be u i jected to an effective atomizingprocess be,fore it leaves the orifice of thetip andwhich said fuel will be placedin centrifugal motion and delivered in the-form of a cone shapedfinelyatomized mistpandwhereby through. V the creation of thiscentrifugalmotion of the fuel, a velocity willbe created whichicauses he.fuelto rota e in thefl me endj ere y bring about Perfeet ombustio Wh leprod c ng an oval shaped ame axially of he umor of relat vely shortlength or p oper.-

Qn" a A further, Obje t of the nven on isto p o: vide a burner havingmeans for. causing pe ect ac mize ion o thev fuelbyqentliifw gal actioncreating-a whirling motion of the fuel at the mixing ha1 nber of the tipand causing-the fuel to expand on leaving the orifice of the and to takethefform of'a' el ti e yhhort; lens hfs t clean flame of high intensitywhose length is calculated withrespect to the length of'the furnace ."soas to prevent the heretofore serious objectionable impingement of theflame against so v through a portion of the burner and the tip".

the back and side walls of the furnace.

A still further object of the invention is to provide atip structure forliquid fuel burners which will be simple, effective for its" intendedpurpose and embodying relatively separable parts which can be, quicklyseparated and removed from or applied to the burner. structure as theoccasion necessitates. Figure 1 is a sideview of a liquid fuelburner'showing my improved tip associated therewith. 7

' Figure 2 is a vertical longitudinal section with parts in elevation.

Figure 3 is aisectiontaken on line 3-3 of Figure 2.

Figure 4: is a view similar to Figure 2 oin a s eam and said body 13.-

the construction of anovel form of tip which may beflusfed inconjunction with various forms of liquid fuel burners- For this reason'Iwill not discuss in detail unnecessary parts or adj unctsofa burner butwill merely describe such desirable featureswand parts that might bemost advantageously used in conjunction with my invention.

The burner structure includes a regulating valve 5 whose stem 6co-actswithaseat' 7 in the casings. Thecasi-ng is sub-divided bydiaphragms or parting walls 9 into afuel space 10 and an air or steamspace'll, the former leading to the valve seat and to a discharge nozzle12. Extending. around the nozzle in spaced relation thereto is acylindrical body 13 joined atlt' to the valve casing so that the innerend of the body opens directly to the air or steam space 11. The

valve casingis providedat one sidewith, a union l5adapted to operativelyjoin a liquid fuel supply pipe with the space 10. A similar union16onthe casing 8 i s adapted to or air pipewith the aforesaid Spae 1- ir a. T 1

The burner /structure is preferably provided with-a dial which co-actswith an indicating pointer 18 on the handle. 19 of the valve stem 6 sothat one can. visually dete'rminethe" quantity of liquid fuel enter Tingthe urner. I

The fuel nozzle'1 2 its end 20 terminatingwithin the body 13 and same Iisdisposed axially thereof: The aforesaid body 13 is threaded exteriorlyat 21 to accommodate an internal thread 22 on the member 23 of myimproved burner tip 24. This 'burner tip isprovided with a reducedextension or neck 25 closed at its forward end by a baffle 26 andprovided with a mixing chamber 27 axially positioned with re- 7 spect-tothe body 13 and in open communicaconstruction is to cause fuel as itleaves the nozzle 12 to be directly discharging into the chamber 27 anda corresponding discharge into said "chamber of air or steam whichpasses from thespace between the nozzle 12 The restricted end 25 of 'thetip member 23 receives the internal thread 28 of a mating tip member 29having a crown wall 30 and an annular wall or surface 51, the latterspaced from the walls of the forward end of the extension 25 and theformer spaced trom the crown wall 26. This provides a. second chamber232 and same is in open communication with the chamber 27 by means 01''an annular set of orifices 83 in the forward extension on the memberThese orifices are each disposed on a tangent to the longitudinal axisof the chamberQT and when fuel and air are admitted under pres sure tosaid chamber 527 it scattered laterally. thereof by way of said orificesand discharged into the chamber coming into in'ipingement with theannular wall or surface 31 oi the member 2a. This sets up centrifugalmotion of the fuel in the chamber 82 and brings about a perfect mixtureof the 't'uelwith the air or steam which is employed as a mixturetherewith. The fuel is thereby finely atomized before itleaves the tip.The

chamber 27 co-acts with the chamber 32 to further induce atomization ofthe fuel and the combination of the two chaniibers is quite desirable.

The member 2-1: is provided with an axia ly disposed orifice by means ofwhich the atomized l'uel permitted to emerge from the tip. The relationof the oriiice 35 to the chamber 32 coupled with the tact that the fuelis made to take a centrifugal motion in the chamber 32, causes the fuelto initially assume the shape of a cone in which the atoms of fuel arein constant twirling motron. The fuel is permitted to expand as itleaves the orifice 35 and when the flame is in operation it takes anoval shape axially ot' the burner and is of relatively short length. Inthis manner a flame is produced in calculated proportion to the lengtho:l' the furnace or boiler with which it is associated. The flame.incident to the process of perfect atomization of the fuel is of highheat intensity and its full eiliciency can be satisfaetorily spentwithout its injurious direct impingement with the rear and side walls ofthe furnace. In this manner perfect combust m at the fuel is eil'ected.However, and as stated I am particularly consistent in the constructionor" the tip per and merely make reference to a suitable means fordelivering oxygen to the burner that is conducive to best results.

In the modified form of my invention shown in Figure at the member 23has its wall 26 provided with an orifice 23 disposed in alignment withthe orifice 35 in the member .Zel. In this form a long flame may beproduced. The tip structure is otherwise identical with that describedin the preferred embodiment Oil: the invention.

l'Vhile I have described what I deem to be the most desirable embodimentof my invent-loin it is obvious that many of the de tails may be Variedwithout in any way departing from the spirit of my invention, and Itherefore do not limit n'iysel't to the exact details of constructionherein set forth nor to anything less than the whole of my inventionlimited only by the appended claim;

What is claimed as new is:

In a liquid fuel burner, a cylindrical body with a tl'uel nozzlearranged therein and having one end disposed adjacent to saidcylindrical body, a sleeve detachablysecured thereto and having atubular nipple projecting therefrom. said nipple having a closed end, aplurality of tangentially disposed openings tormed therein and project in through the side wall oi said nipple, said openings being in the sameplane and a cap removzibly arranged on the nipple, said cap having itswall spaced therefrom and-provided with a central outlet opening.

In testimony whereof I have aliixed my signature.

' TEARLE I. STAPLES.

